Both Danny Wells and Christopher Welch died November 28th and December 3rd, at ages 72 and 48 respectively. Danny was Luigi's actor / VA on "The Super Mario Bros. Super Show"; Christopher was Tails on "The Adventures of Sonic the Hedgehog". (he'd appeared in a couple of Spielberg movies later on - The War of the Worlds and Lincoln)

The Super Mario Bros. Super Show was a childhood favorite. I was disappointed to find out a few years ago that it hasn't aged well at all, but it sure was fun as a kid and I have good memories of watching it with my friends after school.

So it seems that after some investigating, that Christopher Evan Welch did NOT voice Tails. Tails' VA was a different Christopher Welch (an 11 year old child actor, presumably now in his 30s) that had a one-off role from acting.